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Income Tax Expense - Summary of Differences Between Tax Expense and Amount Arise Using Statutory Tax Rate Applicable to Profits of Entities (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Reconciliation of accounting profit multiplied by applicable tax rates [abstract] |  |  |
Profit before income tax | ₩ 106,347 | ₩ 168,699 | ₩ 109,882
Income tax using the statutory tax rate of each country | 19,749 | 31,300 | 23,951
Adjustments |  |  |
Expenses not deductible for tax purpose | 481 | 9 | 7
Non taxable income | (350) | (131) | 0
Withholding tax | 6,322 | 8,615 | 5,028
Utilization of previously unrecognized loss carried forward | (298) | (714) | (239)
Tax credit | (1,413) | (1,174) | (2,131)
Corporate tax on unappropriated earnings | 95 | (134) | 1,085
Changes in deferred tax liabilities related to investment in subsidiaries | (1,058) | (422) | (1,101)
Others | (2,083) | (632) | 224
Total adjustments | 1,696 | 5,417 | 2,873
Income tax expense | ₩ 21,445 | ₩ 36,717 | ₩ 26,824
Effective tax rate | 20.00% | 22.00% | 24.00%

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